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R. CAMPBELL. APPARATUS PUR MANUFACTURING SOIL PIPES.

No. 590,823. Patented-Sept. 28,1897.

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No. 590,823. Patented Sept. 28,1897.

k w .Wm @I .df aww l Il @Nimah STATES PATENT Brien ROBERT CAMPBELL, OF GADSDEN,^ALABAMA, ASSIGNOR OF ONE-HALF TO VILLIAM H. VELLER, OF SAME PLACE.

APPARATUS FOR MANUFACTURING SOIL-PIPES.

SPECIFICATION forming part of Letters Patent No. 590,823, dated September 28, 1897.

Application filed February 4:, 1897. Serial No. 622,020. (No model.)

To AZZ who/it it Ht/ty concer/f,.-

Be it known that I, ROBERT CAMPBELL, a citizen of the United States of America, residing at Gadsden, in the county of Etowah 5 and State of Alabama, have invented certain new and useful Improvements in Apparatus for the Manufacture of Soil-Pipes; and I do hereby declare the following to be a full, clear, and exact description of the invention,such as 1o will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to an improved apparatus for the manufacture of cast-metal soil-pipes or analogous hollow ware which can be cast in iiasks supported in a horizontal position. zo One of the objects of my invention is to dispense as far as possible with hand-labor, such as shoveling, sifting, andramming the sand, and also with skilled labor in forming the mold and substitute therefor mechanical devices which operate to deliver the sand upon the pattern, shape it thereon by a mechanically-guided strike, after which the sand is'compressed to form a section of the mold, the means employed being for the purpose of 3o manufacturing cast-metal soil-pipes from green-sand molds. A

My invention, with the above ends in View, relates to means for preparing green-sand molds for casting purposes, which will be compressed so as to produce a mold-body in which the sand is of uniform density throughout.

In the accompanying drawings, Figure lis a side elevation of the pattern-frame, 'show- 4o ing the pattern upon its support, movable bed-plate, operatiu g mechanism therefor, and the sand-strike. Fig. 2 is a side elevation, partly in section, of the cope or upper section of the casing or flask. ofthe flask. Fig. 4 is a vertical sectional view taken through the line 4 4 of Fig. l. Fig. 5 is a sectional View taken through the line 5 5 of Fig. Fig. (3 is a vertical sectional view showing a flask or casing for mold- 5o ing two pipes. Fig. 7 is a detail sectional View showing the set-screws which connect Fig. `3 is a plan View` the sand-strips to the casings or fiasks. Fig.

S is a side elevation showing mea-ns for delivering sand to the mold and compressing the same upon the pattern.V Fig. 9 is a front 55 elevation ofsuch mechanism; and Fig. l0 is a side elevation, partly in section, of the gatepin. v

In the accompanying drawings, A refers to the pattern-frame, the construction of which 6o is modified to meet the requirements of the compressor, said pattern-frame and the parts carried thereby, with the `exception of certain novel features, being shown and described in my patent dated July 18, 1893, No. 501,824.

The frame A carries shafts a, having arms a', connecting-rods A, cams a", and operating-handles A, which are connected to the shafts. y

B refers to the pattern-support, to which 7o the pattern is secured, said support being rigidly attached to cross-bars b, which are connected to the frame, and said pattern-support lies in an opening in a movable bed-plate O, which When lowered rests upon the upper edge of the frame A, said frame having upwardly-projecting guide-pins a" for engagement With guide-openings in the iiask.

D refers to brackets, which are carried by the ends of the frame and are provided with 8o horizontal slots d for engagement with bolts or pins carried by arms D', to which the said strike D" is secured, said holder or strike having adjacent to its ends projecting handles, as shown. The frame A also carries suitable brackets d', which serve as supports for the strike when lowered.

Upon the 'longitudinal upper edges of the movable bed-plate C yare positioned sandstrips c, the edges thereof adjacent to the pat- 9o tern-support being beveled, so as to provide vertical' shoulders which serve as guides for the flask,and the movable bed-plate has upwardly-projecting lugs c', against which the outer edges of said strips abut. 9 5

The pattern E is attached to the fixed pattern-support B in any suitableA manner, and said pattern carries at its ends guides E for the strike, which guides may be a part. of the movable bed-plate or attached thereto. The 1 oo lower edge of the sand-strike conforms tothe contour of the pattern and is held so thatit 'is about one inch and a half above the pattern to provide a mold, which before it is coin.- pressed is of that thickness throughout.

The movable bed-plate C is provided with perforations or holes, which are positioned to correspond with the openings in the gatepockets of the cope, and these perforations are adapted to receive the lower hollow section of the gate-pin. (Shown in Fig. l0.)

In making a mold with the parts of my improved molding machine hereinbefore described I use an apparatus which embodies a table or support F for the pattern-frame A, which when lowered is positioned slightly above the floor-line, and it is suitably connected with mechanical means for raising and lowering, which means may bea cylinder with piston and piston-rod, the cylinder being connected with a source of power, either steam, water, or compressed air.

F refers to supports, which carry an oseillating hopper F, which has its delivery in a vertical line with the pattern and a considerable distance above the same, so that the sand will fall with sufficient impact on the pattern. Above the hopper there is located a sand screen or sifter FH', into which the sand is delivered, preferably, by an endless carrier of any suitable construction. The sifter can be provided with a stirrer or it can be reciprocated by any suitable mechanism.

Below the floor of the foundry, and preferably on each side of the cylinder, are supports G G, and between each pair of supports are journaled trunnions, having depending arms which carry heavy counterweights, and upward]y-projecting-arms to which are bolted the press-head G, such construction providing means for moving the press-head out of line with the pattern when it is desired to deposit sand thereon, its posit-ion when out of line with the pattern being shown in dotted lines in Fig. S. A

In connection with the appliances hereinbefore described for use in the manufacture of soil-pipe, flasks of ordinary construction are not applicable, and the improved flask which I use in carrying out my invention consists of a cope and drag of novel construction, which may be termed a compressioncasing. The cope II, or upper part thereof, is similar in construction to the drag, the only substantial difference being that the cope has gate-pockets, so that the same description and referenceletters are applicable to each part, and it is only necessary to describe the construction of the cope, in which I-I refers to the gate-pockets, and 7L the handles, which are connected to the ends of the cope, so that they can be moved inwardly when not in use, they being connected to the cope by bolts which pass through slots in the handles, the outer ends of the handles being rounded to provide grasping portions, While the inner ends are flattened, said flattened portions having the slots formed therein.

Il refers to transverse ribs, which extend across the cope and are slightly higher than the gate-pockets. Projections with perforations 7b are also provided for engagement with the guide-pins a" in the bed-plate.

7L. refers to the ven t-holes in the flask, wh ich provide for the escape of gas from the green sand in casting.

The cope and drag of the con'lpression casing or flask are provided with sand-ribs 7L, which are positioned so as to be about four inches from each other and materially assist in holding the sand in place when the llask is lifted away from the pattern. Perforations are also provided adjacent to the longitudinal edges, through which pass set-screws 'L' of less diameter than the perforations, said set-screws being retained in place by means of plates I, through which the upper ends of the screwsV pass, and beneath said plates the screws carry collars. The sand-strips c have beveled edges and vertical shoulders, which shoulders abut again st the depending portion of the lower edge of the cope and upwardlyprojecting portion of the drag, the planed edges of said strips abutting when the parts of the flask are brought together, and are retained in place by the set-screws. Sufficient movement is provided for by the loosely-f1tting set-screws to allow for expansion and contraction of the strips with relation to the flask.

If desirable, a double flask, as illustrated in Fig. 6, may be used.

The gate-pin M (shown in Fig. l0 of the drawings) is in two parts, and the lower member m-being hollow and of such relative size that when placed in the holes therefor in the bed-plate it will not project above-the upper surface of the sand, and before compressing the sand the upper member m thereof is placed in the opening at the base of the gatepocket, said pocket being then lilled with sand. After compression and prior to casting both parts of the pin may be removed as one piece, so as to leave a gate or way for the passage of the metal, which connects with channels which are formed in the usual manner.

By providing a gate-pin having a hollow lower section the sand that may find its way into the hollow portion of the pin is not compressed, so that no material resistance is offered to the insertion of the dowcl which is formed on the upper part of the pin.

The cores are made and set in the usual manner, and when the lower half or drag of the mold is completed and set in its place in the molding-room the core or cores are then set in that part of the mold, and the top half is then molded and placed thereon.

In operation the pattern-frame, which is secured to a power-operated and vertically-movable table, is lowered so as to be positioned at a suitable distance above the licor-level, the press-head being swung to one side and secured, so as to be out of line with the pattern and other parts carried by the frame.

IOO

IIO

Green sand properly prepared is then carried to the sieve and falls into the hopper and therefrom upon the pattern with considerable impact. As the sand falls the sand-strike is moved over the pattern, and when struck to the lrequired form the strike is drawn along the slot and placed upon one of its supporting-brackets. Previous to letting sand fall on patterns and striking the sand the lower ends of the gate-pins have been placed in position in the movable bed-plate, as well as the sand-strips which rest upon the same. The next operation or step is to set one of the parts of the iiask over the sand which is now on the pattern. The inner part of the fiask touches the sand snugly throughout its entire length and is guided in place by the pins and lugs, which insure a direct vertical movement thereof. The uppersections of the gatepins are placed in the gate-pockets, so that the split dowel-pins will engage with the hollow lower section thereof, the upper ends of which may be iiush with the upper edge of the base of the gate-pockets, while the upper end is Hush with the upper edge of said pockets, which are filled with sand before compression. The mold being ready, the pressing is accomplished by moving the press-head into a vertical position, when steam, water, compressed air, or other power suitably directed is employed to raise the pattern-frame. The braces or ribs of the casing or flask, contacting with the press-head, compress the sand one-half of an inch, more or less. Before compression the thickness of the sand is about one and one-half inches, the flask or drag then resting upon the sand-strips so as to abut against the lugs thereof. After, compression of the mold the sand-stripsare secured to the part of the flask by the set-screws and virtually become a part thereof and assist, with the sand-ribs, in holding the sand in the casing or flask.

To remove the mold and flask, the patternframe is lowered and the press-head swung out of line thereof. The handles connected to the shafts of the pattern-frame support are depressed, which operates the'cams and throws them in contact with the rollers in the movable bed-plate, which is lifted, and separates the mold from the pattern more readily and effectively than can be done by the usual methods. The part of the flask, with the completed partof the pipe-mold, is then further moved by hand or otherwise and set in place in the molding-room and the casting done in the usual manner.

By this method of making pipe the art is greatly simplied and the cost of manufacture reduced. A better article is also furnished, as the molds are uniform. Y

The means herein described and illustrated are designed especially for use in the production of that style of cast-iron pipe which is styled in the trade soil-pipe.

I do not wish to limit myself to any particular means of power for compression, as

said feature of my improvement may be modified and many different styles of presses may be used, and when so used for the purpose set forth will be within the scope of my claims.

It is also obvious that changes may be made in the form of the flask without departing from the spirit of my invention.

The hopper F is swung loosely on trunnions, so that it may move backward or forward over the face of the patterns. The sand in falling from it will strike the pattern, beginning at one side and finishing at the opposite side, the sand-strike following the sand as it falls.

IfIavinglhus described my invention, what I claim as new, and desire to Vsecure by Letters Patent, is-

l. In a molding apparatus, the combination with a pattern-frame having upwardly-projecting pins, a movable bed-plate with guidelugs, a pattern carried by a pattern-support, of sand-strips which engage with the bedp'late and lugs tl1ereof,a easing or section of a iiask having side flanges with guide-openings through which the projecting pins of the pattern-frame pass, and means for connecting to the easing the sand-strips for the purpose set forth.

2. In a molding apparatus for forming green-sand molds in which the article is cast, the combination with the molding and compressing means substantially as shown, of a cope having a raised portion above the pattern and side fianges, said raised portion and side flanges having vent-holes, a series of transverse braces with straight upper edges and a series of gate-pockets the upper edges of which are-disposed so as to be below the upper edges of the transverse -braces for the purpose set forth.

3. In an apparatus for preparing green-sand molds, the combination with a verticallymovable pattern-support, a press-head supported so as to be swung in and out of line therewith, a pattern carried by the patternsupport, a sand-strike connected to the pattern-support and movable manually over the pattern, sand-strips carried by a bed-plate, the sections of the flask having a series of transverse braces with straight upper edges, and means for connecting the sand-strips to the edges of the section of the flask substantially as shown.

4. In a molding apparatus, the combination of a vertically-movable frame, a pattern carried thereby, a press-head mounted so as to be swung in or ont of line with the patternsupport, a hopper mounted above the pattern-support and a sand-sifter above the hopper to provide means for delivering sand upon the pattern; together'with a compression-casing which forms a part of a flask, said com-4 pression-casing having transverse braces for engagement with the press-head and projecting portions upon the edges thereof. together with sand-strips which are carried by the bedplate of the pattern-support and means for ICO IIO4

connecting the at'oresaid sand-strips to the compression-casing, substantially as shown and for the purpose set forth.

5. In combination with a pattern-frame having a movable bed-plate, and a fixed pattern-supl'iort, of a sand-strike carried by the frame, arms for guiding the same over the pattern, said arms bein g connected to the support to permit the strike being moved below and to one side of the bed-plate, substantially as shown.

G. In combination with a suitably-supported patterlrframe, a pattern carried thereby and provided with guides, of a sand-strike connected to the frame so as to be movable, pivotally and laterally, with respect to .the pattern, and brackets attached to the frame to support the strike, substantially as shown.

7. The colnbination with a pattern-frame and pattern supported thereon, of a horizontally-slotted bracket; strike-holders which engage with said bracket and a strike pivotally carried by the holders, substantially as shown.

S. In combination with a frame having a fixed pattern-support, plates with horizontal slots secured to the end of the frame, and side projecting brackets, of a strike carried by holders which engage with the slots in the plates, substantially as shown and for the pn rpose set forth.

9. In a molding-machine, the combination of a fixed pattern-support, of a movable bedplatc provided with an opening for the pattern and having at intervals upwardly-projectinglugs, together with sand-strips carried by the bed-plate to one side of the pattern so that the outer edges thereof, will abut against the projecting lugs, substantially as shown.

l0. In combination with a flask or compression-casing provided with side flanges having perforations therein, of set-screws carried loosely by said flanges together with sand-strips having threaded apertures with which the set-screws engage for the purpose set forth.

l1. rlhe combination with a compression flask having a gate-pocket of a gate-pin con structed as shown, said pin having a tubular and longitudinally-tapered lower section, and an upper section which carries a spring-dowel for engagement with the bore of the lower section of' the pin.

I2. In an apparatus for molding soil-pipe, the combination with compressing mechanism upon whieh a patternft'rame and pattern are mounted, of' a hopper and sieve positioned above the same, a press-head movable in and out of line with the pattern-frame, together with a sand-strike carried by the patternframe, a fiask or compression-casing adapted to engage with the press-head, and means carried by the pattern-frame to raise the compression casing or flask and mold from the pattern, the parts being organized substantially as shown.

13. A cope or part of a colnpressiolrcasing having a central convex portion and side flanges, each part having a series of ventholes, a series ot' transverse braces with straight upper edges and gate-pockets between the braces, the upper edges of which are below the upper edges of the braces, the side flanges having depending portions on their under sides which form shoulders and means for connecting thereto sand-strips, having shoulders and beveled inner ends, the inner sides of the convex portions having sand-ribs which project on a line with the shoulders on the lower edge of the under sides of the casing, substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT CAMPBELL.

INTitnesses:

O. R. GOLDMAN, L. Snrrn. 

